Silencer for a two-stroke motor of a power tool

A silencer for a two-stroke motor of a power tool, comprising:

• a silencer inlet that adjoins a flow channel having a flow channel length to an outlet of a combustion chamber of the two-stroke motor;
• a first chamber having a first chamber depth, an end of the flow channel opposite to the silencer inlet opening into the first chamber;
• and
• a second chamber into which exhaust gas flows through a main outlet branched from the flow channel, the second chamber having an outlet from which the exhaust gas flows, wherein
• due to the inertial mass of the exhaust gas,
• the exhaust gas first flows into the silencer inlet, predominantly filling the first chamber, and after filling the first chamber,
• the exhaust gas flows back towards the combustion chamber, creating a counterpressure in a direction of the combustion chamber;
• wherein a total length including the flow channel length and the first chamber depth is less than a calculated length L determined in accordance with:
• L
• =
• c
• s
• ·
• φ
• 12
• ·
• n
• ⁢
• ⁢
• in
• ⁢
• ⁢
• meters
• where
• cs=Speed of sound of the hot exhaust gas (m/s)
• φ=Crank angle in degrees from opening of the outlet of the combustion chamber to closing of the flow channel
• n=Motor Speed in 1 rev/min.